Invalid example in notifications/attachments

[jritsema]

The Example Action under Notifications / Attachments / Standard Attachments / Example action does not seem to work.

automation:
  - alias: Notify Mobile app attachment
    trigger:
      ...
    action:
      - action: notify.mobile_app_<your_device_id_here>
        data:
          message: "Something happened at home!"
          data:
            # an example of an absolute url
            image: "https://www.home-assistant.io/images/default-social.png"

When I tried this, I do get the mobile notification, however, I don’t see a thumbnail, and when I expand it, it says, “Failed to load attachment - URLSessionTask failed with error: The internet connection appears to be offline”.

It appears that your home assistant server needs to be exposed to the internet, even if you want to only use absolute public URLs to another server. If this is the case, I would suggest noting this in the documentation as it feels misleading.

Also see https://community.home-assistant.io/t/ios-notifications-with-public-images-on-a-private-server/

[dshokouhi]

It appears that your home assistant server needs to be exposed to the internet, even if you want to only use absolute public URLs to another server. If this is the case, I would suggest noting this in the documentation as it feels misleading.

Hello on the same page you have linked we actually have a note about attachments requiring internet.

https://companion.home-assistant.io/docs/notifications/notification-attachments#downloading

Attachments are required to be accessible from the internet

However for a full public URL (that is accessible in a browser) it should work as is. On Android the URL is accessed directly so this may be a iOS only issue as you describe. Have you tested the URL in a browser to make sure it loads without authentication? Authentication is only added with relative URLs.

[jritsema]

Yes, I tried the example in the docs verbatim.

https://www.home-assistant.io/images/default-social.png

This url is publicly accessible. It does not work on iOS.